If the top soil has been eroded, we retire a land and grow over it:

Related Mcqs:

1. Removal of top soil by soil erosion result in the loss of soil:

   A. Nitrites
   B. Nitrates
   C. Nitrogen
   D. Nitric and nitrous acids

2. In water logged soil plants cannot grow properly because the soil is:

   A. Physiologically wet
   B. Physiologically dry
   C. Physically dry
   D. None of the above

3. Eroded soils are:

   A. Rich in plant nutrients
   B. Unaltered in plant nutrients
   C. Devoid of plant nutrients
   D. All of these

4. Endemic plants are those which grow in:

   A. Fresh water lakes
   B. Shady places
   C. Tissue of other plants
   D. Geographically limited areas

5. Euhalophytes grow where the concentration of NaCl ranges:

   A. Between 0.1 – 0.5%
   B. Between 0.01 – 0.1%
   C. Above 1.0%
   D. Between 0.5 – 1.0%

6. Plants grow sparsely in arid regions of the world:

   A. Only because of high temperature
   B. Because no seeds fall near the soil
   C. Because of several environmental factors combining together
   D. Because the soil is sandy

7. Plants that grow in a marshy saline habitat are called:

   A. Hydrophytes
   B. Xerophytes
   C. Mesophytes
   D. Mangroves

8. Vast Indus food plains have been cleared of natural vegetation to grow crops. Very little wildlife habitat has been left. Only the animals like ______ and the wild hare occur in these areas:

   A. Jackal, Mangoose
   B. Jungle Cat, Civet Cat
   C. Sclay Ant Earter, Desert Cat
   D. All of the above

9. When a plant first begins to wilts permanently in a pot, its 54.5 gms of soil has 4.5 gms of water. The PWP of this soil is:

   A. 4.50%
   B. 9%
   C. 8.25%
   D. 16.50%

10. The ration of volume of pores in the soil to the total soil volume is referred to as:

    A. Pore frequency ratio
    B. Pore density ration
    C. Pore abundance ratio
    D. Pore space ratio